$ git clone -n https://src.fedoraproject.org/rpms/dl-fedora.git /var/lib/mock/f41-build-840916-161037/root/chroot_tmpdir/scmroot/dl-fedora
Cloning into '/var/lib/mock/f41-build-840916-161037/root/chroot_tmpdir/scmroot/dl-fedora'...
$ git fetch origin a965c4e372df58830075b23220a383b062dcbc4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dl-fedora
 * [new ref]         a965c4e372df58830075b23220a383b062dcbc4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a965c4e exclude ix86